also: こうぎょく
Mineralogy term for the gemstone topaz. Both readings refer to the same mineral.
Topaz is the birthstone for November.
A large topaz is set in this ring.
topaz
Standard kanji spelling for topaz. Both readings おうぎょく and こうぎょく are used.
Alternate reading for the same kanji spelling. おうぎょく is more common.
From 黄 (yellow) + 玉 (gem, jewel), referring to the typical yellow color of topaz. The reading おうぎょく uses the on'yomi of both characters; こうぎょく is an alternate on'yomi reading.